New fuel-efficient heavy duty diesel trucks have saved 13.3 million
barrels and 560 million gallons nationwide from 2010-2012

WASHINGTON--July 31, 2013: The increasing
market acceptance of advanced clean diesel technology in passenger vehicles
and heavy duty trucks will play a major role in helping California achieve
future fuel savings and climate objectives, according to new research
presented today by the Diesel Technology Forum to the California Energy
Commission.

"As California policymakers evaluate future transportation fuels and
technologies, this new research underscores the key role for clean diesel
technology in saving energy and reducing CO2 emissions in both passenger
cars and heavy duty applications," Allen Schaeffer, the Executive Director
of the Diesel Technology Forum told members of the commission. "The
importance of diesel technology to meeting California's climate and clean
air goals is made possible by the inherent and proven energy efficiency of
diesel, the transformation to clean diesel fuel and engine technology, and
the significant penetration of diesel in key sectors of California's
economy."

Schaeffer made his comments during a presentation to the California
Energy Commission during the Joint Lead Commissioner Workshop on
Transportation Energy Scenarios to discuss potential growth projections for
alternative transportation fuels, vehicles and infrastructure and factors
related to growth. The workshop was designed to outline the expected
contribution of biofuels, electric transportation, natural gas, hydrogen
and other options to California's transportation sector. DTF's presentation
was based on research it commissioned by the Martec Group in June 2013.

"Significant fuel savings and clean air benefits are accruing from the
use of new clean diesel engines in passenger vehicles, and from 2005-2012
have saved California 2.5 million barrels of oil and 0.7 million tonnes of
CO2," Schaeffer said. "Using conservative estimates of future market
penetration, the increasing choice of clean diesel instead of gasoline for
use in passenger cars, pick-up trucks and SUVs in California will displace
165 to 240 million gallons of gasoline(2013-2020).

"There's no surprise that clean diesel holds great promise for
California in the future, since California is the number one state today
overall in diesel car and pick-up truck registrations. And from 2010-2012,
California was the number one state with the fastest growth in
registrations of new diesel cars and SUVs," Schaeffer said.

Major fuel savings and CO2 reduction benefits also come from the
increasing use of new generation diesel engines used in heavy-duty
commercial trucks, also according to the new Diesel Technology Forum
research. California has the third highest registration (20 percent) of the
new generation (2007 and later) clean diesel commercial trucks (Class
3-8).

Since 2000, heavy duty diesel trucks have been transformed to a near
zero emissions state, with over 98 percent reductions in emissions of
particulate matter (2007) and beginning in 2010, near-zero emissions of
nitrogen oxides. The newest clean diesel heavy-duty trucks introduced from
2010-2012 make up 11 percent of all registrations and are achieving
significant reductions in fuel use of 3-4 percent conservatively, resulting
in savings of as much as 560 million gallons of fuel, or 13.3 million
barrels of oil and 5.7 million tonnes of CO2 on a nationwide basis.

"The real-world 3-4 percent fuel savings of new 2010 and later MY clean
diesel heavy duty trucks is significant for several reasons, because of the
energy intensity of heavy duty vehicles and because diesel engines are the
technology of choice for over 90 percent of commercial trucks," Schaeffer
said. "Achieving these present gains in fuel efficiency while maintaining
near-zero emissions is particularly notable, because these are competing
forces. Heavy-duty truck and engine makers are also working toward meeting
first-ever GHG and fuel economy mandates from EPA and NHTSA beginning in
2014 and in 2018."

0.7 million tonnes of CO2; 110 million gallons of gasoline; 2.5 million
barrels of crude oil.

Conservative estimates of fuel savings and CO2 reductions for 130,000
new light duty diesel engines sold each year between 2013-2020 will save
California consumers an additional:

165 million to 240 million gallons of gasoline; 1.0 to 1.3 million
tonnes of CO2.

Increased usage of biodiesel will have an additional positive savings
for America.

Up to a conservatively estimated 260 million gallons of gasoline
(national estimates).

Heavy-duty Diesel Vehicles Over 20 percent of the 2012 heavy duty fleet
are powered with new technology diesel engines built after 2006.

New technology diesel engines have reduced NOx and PM emissions by more
than 95% over the last 25 years. Savings from 2006-2012: 1 million tonnes
NOx, or the equivalent of emissions from 105 coal power plants over one
year; 27,000 tonnes of particulate matter, or the equivalent of emissions
from 225 million light duty vehicles.

11 percent of all on-highway diesel engines in operation are built after
2010 and equipped with SCR emission control technology saving GHG and
fuel.

This fuel savings equates to: 560 million gallons of diesel and an
average Class 8 truck savings of $3,500/year; Reducing the NOx emissions
from 105 coal power plants; Removing the CO2 emissions from 1.2 million
light-duty vehicles from the road for one year; 13.3 million barrels of
crude, roughly 5 percent of the Strategic Petroleum Reserve for sweet
crude; 5.7 million tonnes of CO2, the carbon sequestration equivalent of
4.6 million acres of forest.

In addition, Schaeffer noted major U.S. and international energy studies
from the National Petroleum Council and World Energy Outlook project diesel
will continue to be the dominant fuel source for transportation for the
next several decades.

In addition, ExxonMobil predicts that not only will diesel surpass
gasoline as the number one global transportation fuel by 2020, diesel
demand will also account for 70 percent of the growth in demand for all
transportation fuels through 2040. ExxonMobil also projects that natural
gas will remain only a small share of the global transportation fuel mix,
at 4 percent by 2040, up from today's 1 percent.

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